Automatic fire-escape



(No Model.)

G. W. F. 'P. MURPHEY.

AUTOMATIC FIRE ESCAPE.

No. 297,620. Patented Apr. 29,1884.

7/? 207/2 mum .a 7/// 21/2222 eases 620 lfllur vhey Frank Jiur u/uy UNITED STATES PATENT OFFICE.

GEORGE W. MUEPHEY AND FRANK P. MURPHEY, OF KENNEY, ASSIGNORS OF TWO-FIFTHS TO PARK B. MURPHEY AND BOTH OF HARBISTOWN, ILLINOIS.

CHARLES M. MURPHEY,

AUTOMATIC Fl RE-ESCAPE.

SPECIFICATION-formin part of Letters Patent No. 297,620, dated April 29, 1884.

I Application filed June 14, 1883. (N model.)

To all whom it may concern:

Beit known that we, GEoW. MURPHEY and FRANK P. MURBHEY, residents of the town of Kenney, countyof De Witt, and State of Illinois, have invented certain new and useful Improvements in Automatic Fire-Escapes, of which the following is a specification, sufficiently full, clear, and exact to enable any one skilled in the artto which it relates to make IO and operate the same. A

Our invention relates to that class of automatic fire-escapes in which a cord and pulley are used for lowering purposes.

In the drawings accompanying and forming '15 a part of this specification, Figure 1 is afront view of mechanism that illustrates the principle of our invention, and Fig. 2 is a sectional view of Fig. 1 on dotted line at m is the pulley, around which cord 1' is wound.

bis a cog-wheel rigid 0n the shaft of pulley m.

c is a pinion that receives motion from wheel I) and imparts the same, through rack and pinion d g, to the oscillating wheel a.

f is a crank-pin on c, that connects with and operates rack (Z. Back (I is provided with a slot that works on the shaft and holds the rackteeth in gear with the pinion. Pinion g and wheel a are rigid one with the other, and both work loosely on their shaft. h provides a point of attachment for a belt or other lowering device. A pintle will be formed on the shaft of pinion c to receive a key to wind up the cord.

In actual use the gearing should be inclosed 3 5 and more compactly arranged, while the form V of the casing e is modified to conform to such modification.

The cord may be attached to an opening in v the burning building and the escaping person descend with'the pulley; or the. pulley may be attached and the operation reversed. As the cord unwinds, the rotating motion of the pulley is conveyed through I) to pinion c, where it is converted into oscillating motion inrack b and imparted as such to pinion gand wheel a.

It will be readily perceived that the power required to'reverse the motion of wheel awill eno. w. MURPHEY.

FRANK P. MURPHEY.

Witnesses HENRY E. Srsson, H. B. BEATTY. 

